BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
TubeLister - Generate a YouTube playlist from your opened tabs.
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).
OrganizeTube - Create video playlists from Youtube, Vimeo and other sources
Quorus - A new way to listen to music through collaboration
Vidlis - Create music playlists from YouTube videos.